import time
ar = [1, 2, 3]
arr = [4, 5]
a = []

arr += ar
arry = arr[-70:]
print('arry', arry)

arr.append(None)
print(arr)
print(a is not None)
print(len(a) > 0)

asort = [[1, 2, 3, 4], [20, 3, 4, 5], [3, 4, 5, 6]]
asort.sort(key=lambda x: x[0])
print(asort)

t = time.time()
print(t)
print(int(t))
t = time.localtime()
print(t)
